# 字典中的判断
# key的判断
zidian = {'小凡': 60, '球球': 23.5, '值': 1506}
print('值' in zidian)
print('值'not in zidian)

# 删除
# 删除指定的键值对（key-value)
del zidian['球球']
# 清空字典的元素
zidian.clear()
print(zidian)

# 新增
zidian['阿瑾'] = 100
print(zidian)

# 修改
zidian['阿瑾'] = 100.785
print(zidian)
